If you have a depressed friend RUN AWAY

I had a depressed friend who was dealing with a lot of problems in his life At first he would vent to me and I would comfort him and everything felt completely normal But over time I noticed that all he ever did was vent and it became impossible to talk about anything else Every single day he would vent literally every day He treated me like I was his therapist and whenever I tried to give advice or help him he would say "you dont understand" and "its not that simple" I got exhausted and felt like he was draining my energy to the point that I started feeling annoyed and upset whenever he talked to me or messaged me because I already knew he was going to start venting about the traumas he went through in his life and Ive heard those stories so many times that I practically memorized them

(Note: I talked to him more than once about seeing a therapist but he couldnt for personal reasons that I wont mention) so i think he was using me like a therapist